Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932560AbcCHPyi (ORCPT ); Tue, 8 Mar 2016 10:54:38 -0500 Received: from mail-wm0-f65.google.com ([74.125.82.65]:33282 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932275AbcCHPy2 (ORCPT ); Tue, 8 Mar 2016 10:54:28 -0500 Date: Tue, 8 Mar 2016 16:54:23 +0100 From: Ingo Molnar To: Dmitry Vyukov Cc: Peter Zijlstra , Wang Nan , Ingo Molnar , LKML , He Kuang , Alexei Starovoitov , Arnaldo Carvalho de Melo , Brendan Gregg , Jiri Olsa , Masami Hiramatsu , Namhyung Kim , Zefan Li , pi3orama@163.com Subject: Re: [RESEND PATCH 0/5] perf core: Support overwrite ring buffer Message-ID: <20160308155423.GA16587@gmail.com> References: <1457322619-170254-1-git-send-email-wangnan0@huawei.com> <20160308134454.GY6344@twins.programming.kicks-ass.net> <20160308134901.GC19756@gmail.com> <20160308135759.GH6356@twins.programming.kicks-ass.net> <20160308152924.GB9147@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2839 Lines: 90 * Dmitry Vyukov wrote: > > so, according to the error message it wants a writable directory. Lets try it that > > way: > > > > triton:~> mkdir go > > triton:~> > > triton:~> export GOPATH=/home/mingo/go/ > > triton:~> go get github.com/google/syzkaller > > can't load package: package github.com/google/syzkaller: no buildable Go source files in /home/mingo/go/src/github.com/google/syzkaller > > Yes, GOPATH needs to be set a writable dir. > You can ignore "can't load package" error. The goal of that step is > checkout syzkaller with all dependencies into correct dirs under > GOPATH. That's already done by now. > Or you can do (/... at the end): > $ go get github.com/google/syzkaller/... > That will checkout and build. > Either way you can continue with the make step. Cool, the '/...' trick works. > > looks like someone wants 'Go' to be used as little as possible! ;-) > > You probably did not observe recently a noobie trying to build a C > project with sufficiently-complicate-build-system and a bunch of > dependencies that needs to be on specific, unknown revisions, and that > still does not compile with you compiler and does not link with your > linker, and then of course target machine has a wrong glibc version :) Nah, old Linux tools very much suck, we know that and we suffer from it. But new tools should not suck! :-) So, going from the description at: http://lkml.kernel.org/r/CACT4Y+Ym0TZLkmRrM0ZGgLpu8kqS-YjoWTMrvaLz=tx2tnyO3w@mail.gmail.com I now have it built, and created $GOPATH/src/github.com/google/syzkaller/perf.cfg with: triton:~/go/src/github.com/google/syzkaller> cat perf.cfg { "http": "localhost:50000", "workdir": "/home/mingo/go/src/github.com/google/syzkaller/workdir", "syzkaller": "/home/mingo/go/src/github.com/google/syzkaller", "vmlinux": "-", "type": "local", "count": 1, "procs": 16, "nocover": true, "nodropprivs": true, "enable_syscalls": [ "getpid", "perf_event_open", "ioctl$PERF*", "prctl$void", "bpf$*", "sched_yield" ] } Then I tried to do: $ bin/syz-manager -config perf.cfg in ~/go/src/github.com/google/syzkaller, but that doesn't work because there's no 'bin' directory: triton:~/go/src/github.com/google/syzkaller> bin/syz-manager -config perf.cfg bash: bin/syz-manager: No such file or directory So that should really read something like: cd ~/go bin/syz-manager -config src/github.com/google/syzkaller/perf.cfg next roadblock: fomalhaut:~/go> bin/syz-manager -config src/github.com/google/syzkaller/perf.cfg 2016/03/08 16:53:44 bad config syzkaller param: can't find bin/syz-fuzzer so how do I proceed from here? Thanks, Ingo